Securing thumb-knobs to roses.



H. LOGKWOOD. SECURING :THUMB KNOBS T0 ROSES. Arrmofi'lon Hum MAY 20, 1010.

Patented Sept. 20, 1910.

IN VE NTOR ATTORNEY tion 15 of the shank turns freely but 0 which I will now describe,

' accompanying actors to indicate theseveral HENRY S. LOCKWOOD, OF SOUTH NORWALK, CONNECTICUT.

SECURING- THUMB-KNOBS T0 ROSES.

Specification of Letters Patent. Patented Sept. 20, 1910.

Application filed. May 20, 1910. Serial No. 562,518.

To all whom it may concern:

Be it known thatL'HnNRY S. LooKwooo, a citizen of the United States residin at South Norwalk, county of Falrfield, tate of Connecticut, have invented an Im rovement in Securing Thumb-Knobs to oses, of which the following is a specification.

This invention has for its object to provide a simple, inexpensive and perfectly secure means for attachin thumb knobs to roses or plates which Wlll permit. free oscillation of the thumb knob, will not become loose and cannot be detached.

With these and other objects, in view I have devised the novel attaching means referring to the drawing forming a .part of this specification and using reference chararts.

Fi ure 1 is a perspective 0 the knob and shan with the rose and attaching washer in section; Fig. 2 a rear elevation of the rose detached; Fig. 3 a cross section thereof;

'Fig. 4 a rear elevation of the shank and knob detached; Fig. 5 a side elevation corresponding therewith; Fig. 6' is an elevatlon of the washer after cupping, and Fig. 7 a section thereof. a

10 denotes the knob which is provided with a base 11 which is cast upon or otherwise rigidly secured to a shank 12. The angular ortion of the shank is indicated by 13. gaid shank is provided with a cylindrical portion 14, having a circumferential groove 16, adjacent which is an, enlar ed bearing portion 15.

1% denotes a rose or plate which may be of any preferred ornamental design or configuration and which is provided with a central hole 18, in which the bearin porand surrounding the hole with a bearing 19 ,with which the base 11 of the knob 1s in contact. In the back of the rose or plate and concentric with hole 18 is a circular recess 20. The knob and shank are secured to the rose or plate by means of a washer 21 which lies in recess 20 and engages groove 16 in the round portion of the shank. The

washer as blanked out is an ordinary circular washer with a central hole 22. The washer is made small enough to lie within recess 20 and the diameter of the hole therein corresponds with the diameter of the shank at the bottom of the circular groove. The washer is then cupped and hole 22 is stretched sufliciently to ermit the washer to be passed over aroun portion 14 of the shank.

In assemblin the shank is passed through the rose or ate from the front, bearing portion 15 oi the shank engaging the hole 18 in the rose and the base of the knob con-, tactin with bearing 19, then the washer is passe over the shank and into recess 20 in the rose and into alinement with groove 16 in the shank and then the washer is flattened in the recess, the effect of which is to contract the hole in the washer to substantially its original diameter and force the metal surrounding the hole into the groove in the shank, thereby locking the parts securely together in such a manner that while perfect-freedom of oscillation of the bearing portion of the shank in the rose is permltted it will be im and shank to become or to wear loose.

Having thus described my invention I claim:

The combination with a knob shank provided with a cylindrical portion having a etached from the rose ssible for the knob circumferential groove and an enlarged bearing portion adjacent said groove, of a rose having an opening to receive said hearing portion, said opening being enlarged ad acent one face of the'rose to form a recess, and a washer located in said recess and having an o enin for the passage of said shank, the ge 0 said opening projecting into said groove.

In testimon whereof I afiix inpresence 0 two Witnesses.

- HENRY s. LooKWooD.

Witnesses:

FRANK'L. SEYMOUR, Vxcron C. SMITH.

my signature 

